However, the so called white speck, as sometimes appeared on the fractography of the checked sample weld, may lead to fracture or burst of steam pipes during high temperature operation.

• 但在抽检样品时接头断口上有时存在所谓的“白斑”组织。“白斑”的存在可导致蒸汽管在高温运行时发生破裂或爆管。